I dunno-
If it spent 32 yrs in Fla., I would say it has stayed indoors and is in pretty good shape. I lived in Florida. I would think given the vin, one should be able to verify whether a GNX. In 32 yrs, needing an A/C dryer could happen. The interior is not as nice as mine, but once again Florida.
The mileage would probably be easier changed with that speedometer. The things I noticed were the bottom outside of the front seats and the glove box door. It is an unfortunate place to take pictures. I was going to check the plug wires on mine but the cover is on it. I changed plugs today and thought they would be original. Not so.
In my state, Missouri, there are mileage's taken at state inspections and all title transfers. With a 17 digit vin, a Carfax and a title search generally keep things straight. Large penalties for deceit.
edit-I have the original tires for mine. Nobody in their right mind would put them on the ground.